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Jim Hokanson


Duke University

250 total contributions since 2009

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Question


thread safety of mx mex functions
Although I'm aware that mx mex functions are generally considered not to be thread safe, it is unclear to me if this applies to ...

10 days ago | 1 answer | 0

1

answer

Submitted


JimHokanson/plotBig_Matlab
Plot large amounts of line data quickly

15 days ago | 5 downloads |

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Answered
Deploying a standalone application to computer with no install privileges
I ended up switching to Octave for this project. Octave can be run without installation. The zip download is about 400 MB which ...

3 months ago | 1

Question


Deploying a standalone application to computer with no install privileges
I wrote a simple GUI which I was planning on placing in a standalone application to be run on a computer without Matlab. I inclu...

3 months ago | 2 answers | 0

2

answers

Answered
Best way to locate shared (.dylib) libraries used by MATLAB mex files on MacOS X
I've had some luck with the following command in the same directory as my mex file. install_name_tool -change /Users/jim/...

7 months ago | 1

Answered
queue addlistener events or place event on EDT
I found a different solution which appears to work nicely: <https://undocumentedmatlab.com/blog/matlab-and-the-event-dispatch-t...

8 months ago | 0

| accepted

Question


Get start time of a daq session
I'm wondering if it is possible to get the time at which the DAQ starts so that I can keep track of other code events, relative ...

9 months ago | 1 answer | 0

1

answer

Answered
is it possible to retrieve command window output of parallel worker
Presumably you could use this when run in the worker ... <https://www.mathworks.com/matlabcentral/fileexchange/31438-command-wi...

9 months ago | 0

Answered
Error is a warning in parfeval function
So, it appears the issue was not with the worker but in the client. After some debugging I tried this instead: function han...

9 months ago | 1

Question


Error is a warning in parfeval function
I have the following (pseudo) code and I'm getting the following warning in my command window (2017b Windows). function par...

9 months ago | 1 answer | 1

1

answer

Question


is it possible to retrieve command window output of parallel worker
Is it possible to retrieve the command window output from a worker when using parfeval? Specifically I'd like to catch listener ...

9 months ago | 2 answers | 0

2

answers

Question


Data transfer specifics for a queue
Documentation for parallel.pool.DataQueue and parallel.pool.PollableDataQueue says next to nothing about how data is transferred...

9 months ago | 1 answer | 1

1

answer

Question


What is the difference between DataQueue and PollableDataQueue
What is the difference between parallel.pool.DataQueue and parallel.pool.PollableDataQueue. It seems the pollable queue is the s...

9 months ago | 1 answer | 0

1

answer

Answered
Retrieve meta.DynamicProperty from class instance
After a bit more searching it appears you need to do: prop_meta = findprop(obj,prop_name); Found at: <https://stackov...

9 months ago | 0

Question


Retrieve meta.DynamicProperty from class instance
Is it possible to retrieve meta.DynamicProperty for dynamic properties from a class instance?

9 months ago | 1 answer | 0

1

answer

Question


is it possible to measure the time it takes to render a figure
I would like to log the time it takes to render a figure. Is there a way to listen for the "start" and "end" of rendering a figu...

9 months ago | 2 answers | 0

2

answers

Solved


An asteroid and a spacecraft
&#128640 Imagine a non-relativistic simple situation. Assume positions p0, p1, p2, and p3 are three dimensional Cartesian ...

9 months ago

Solved


5th Time's a Charm
Write a function that will return the input value. However, your function must fail the first four times, only functioning prope...

9 months ago

Question


Alignment of textarrow text with line
How would I get the text from a textarrow annotation to align with the start of a line. I am unclear how to control the textbox ...

9 months ago | 1 answer | 0

1

answer

Solved


Number of Even Elements in Fibonacci Sequence
Find how many even Fibonacci numbers are available in the first d numbers. Consider the following first 14 numbers 1 1 2...

9 months ago

Solved


"Cody" * 5 == "CodyCodyCodyCodyCody"
*Alice*: What? *"Cody" * 5 == "CodyCodyCodyCodyCody"*? You've gotta be kidding me! *Bob*: No, I am serious! Python supports...

9 months ago

Solved


The 5th Root
Write a function to find the 5th root of a number. It sounds easy, but the typical functions are not allowed (see the test su...

9 months ago

Question


uicontrol vs annotation render order
I was hoping to get uicontrols rendered below annotations. The order of creation of a uicontrol vs an annotation does not seem t...

10 months ago | 1 answer | 0

1

answer

Question


uicontextmenu not rendering reliably
I'm manually showing a uicontextmenu in response to a button press: %In the button press callback ... p = getpixelpositi...

10 months ago | 0 answers | 0

0

answers

Answered
How do I plot a function which depends on a changing variable?
You could use something like animatedline if you want to calculate a single point and add it to a graph. If you want to use a lo...

10 months ago | 0

| accepted

Answered
xlim listener for zoom reset and linkaxes strange behavior
It turns out that there is a lot of publicly readable code behind linkaxes, or really, linkprop. After some debugging I discover...

10 months ago | 1

| accepted

Answered
queue addlistener events or place event on EDT
Here's one (ugly) solution. This setup function does the following: # Sets up listeners that I care about. # Attaches a J...

10 months ago | 0

Question


xlim listener for zoom reset and linkaxes strange behavior
I've attached a 'XLim' listener to an axes object. I had been previously using a timer due to issues with catching the events...

10 months ago | 1 answer | 1

1

answer

Question


queue addlistener events or place event on EDT
Every time the xlim changes I want to run some code. plot(1:100) L = addlistener(gca, 'XLim', 'PostSet', @my_callback);...

10 months ago | 2 answers | 0

2

answers

Question


read raw data using daq toolbox
It appears that with the old acquisition toolbox it was possible to read raw data from a NI DAQ using daqread(). Is it possible ...

10 months ago | 1 answer | 0

1

answer

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